Adobe DigitalEditions and Amazon DigitalBooks earned $3 million in revenue in 2016, the company said on Thursday, with the earnings per share of each representing a 37.2% and 34.5% increase, respectively.

DigitalEditions earned $2.5 million in sales in 2016 and AmazonDigitalBooks earned more than $1 million, the report said.

The company’s digital publishing business generated $2 billion in revenue last year, and Amazon is planning to double its digital publishing operations to 5 million titles by 2021, according to the report.